jon: steve moore from the "wall street journal." steve, thanks for breaking it down. uma: an emotional start to the senate hearings on gun violence. as you just heard former congresswoman gabrielle giffords speaking before the senate judiciary committee. senator charles grassley the ranking member of that committee will be joining us with more about what the committee hopes to accomplish, plus a growing call to ditch the u.s. constitution? who says the supreme law of the land is outdated, and why? a live report coming your way next. [ loud party sounds ] hi, i'm ensure clear... clear, huh? i'm not juice or fancy water. i've gotine grams of protein. that's three times more than me! [ female announcer ] ensure clear. nine grams protein. zero fat. in blueberry/pomegranate and peach. uma: is the supreme court the supreme hrauft united states, the u.s. constitution we learned about it and the bill of rights from the time we're in grade school. there are some people who say the constitution is no longer relevant and should be put aside. shannon bream is joining us live with